{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "The test of significant toxicity ( TST ) analysis is a two - sample comparison test that uses Welch ' s t test to compare organism responses in a sample ( effluent or surface water ) with responses in a control or site sample ."}
{"Chemical": []}